Frame extension for typewriting machines



July 18, 1933. F. H. TREGO FRAME EXTENSION FOR TYPEWRITING MACHINES 319d March 14, 1930 2 Sheets-Sheet 1 INVENTOR frank/i mega. W ATTORNEY July 18, 1933. F. H. TREGO FRAME EXTENSION FOR TYPEWRITING MACHINES Filed March 14, 1930 2 Sheets-Sheet 2 INVENTOR Fran/r f2 Treqa BY 0 2 Z 2 ATTORNEY Patented July 18, 1933 UNITED STATES PATENT OFFICE FRANK H. TREGO, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO RALPH C. COXHEAD CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE FRAME EXTENSION FOR TYPEWRITING MACHINES Application filed March 14, 1930. Serial No. 435,706.

in bar which may be attached to the mainframe to widen the supporting base.

The cross bar is preferably located at the rear part of the machine and may be secured to the frame where the rear feet are usually 35 secured in a machine having a short carriage.

A feature of the invention relates to the interchangeability of feet and crom-bar to suit a short carriage and a long carriage machine respectively.

Other features and advantages will hereinafter appear.

In the drawings,

Fig. 1 is a rear view of the machine showing the invention applied thereto;

Fig. 2 is a side elevation of the machine; Fig. 3 is atop plan view of one end of the frame extension;

Fig. 4 is a vertical section taken onthe 30 line 44 of Fig. 1; and

Fig. 5 is a top plan view of the main-frame showing the frame extension applied thereto.

Similar reference characters represent similar parts throughout the several views.

The invention is herein illustrated as applied to a varityper writing machine which includes a main-frame to which is secured a rail 11 upon which a carriage 12 travels back and forth through the medium of anti- 40 friction balls or rollers 13; the carriage being further guided in the usual manner by means, not shown.

The main-frame 10 has two front legs or WVhen a long carriage is used, however, it

is desirable to increase the base of the mainframe so as to prevent the machine from tipping as the carriage moves to its extreme position in either direction. The rear feet 19 are therefore located considerably outside of their usual position and are secured to the ends of a cross-bar 20 by screws 21; said crossbar being secured to the ends of the posts by screws 22.

It will be noticed that the frame extension is almost directly under the carriage, where it is most effective to prevent tilting of the machine.

The cross-bar, as illustrated herein, is channel-shape in cross-section and is pressed up from sheet metal so that it is light and yet strong. It comprises an intermediate, horizontal section 23, which extends under the mainframe from one post 15 to the other, and inclined sections 24 extending upwardly from the central section 23 to the feet 19 so that said feet may be attached to the bottom side of said bar 20, which bottom side is at the same horizontal level as the bottom of the rear posts 15 in order that the same feet may be secured directly to the posts 15 (for short carriage machines) or may be secured to the ends of the frame extension without affecting or altering the height of the machine.

To receive the screws 21, by which the feet 9 are secured to'the extensions 24 of the cross-bar 23, sockets or heads 25 are permanently secured to said extensions. Each socket 25 is ,provided with a cylindrical portion 26 which extends through an aperture 27 in the cross-bar. The protruding end of the portion 26 is peened, as indicated at 28 (Fig. 4), to secure the socket to the crossbar.

To secure the socket against turning in the aperture 27 which may otherwise be occasioned by the screw 21, two slots 29 extend from the aperture 27 into which some of the material of the socket portion 26 is forced during the peening operation. Thus the socket 25 is locked against rotation.

The feet 17 and 19 may be provided with metal bushings to be engaged by the screws 18 and 21.

While one specific form of the invention is shown and described herein, it is to be understood that the invention is not to be confined thereto as changes may be made Without departing from the spirit of the in-' ventionas defined in the appended claims.

I claim 1. In a typewriting machine, the combination'of a main-frame, a cross-bar detachably secured to said frame and located beneath it, said cross-barextending beyond the sides of said main-frame and comprising a horizontal portion and two inclined portions extending upwardly and outwardly therefrom, and feet attached to said bar under the outer ends of the inclined portions.

2. In a typewriting machine, the combination of a main-frame, a carriage supported thereon, a cross-bar secured to the mainframe and located beneath it, the cross-bar extending at each side upwardly and outwardly from the main-frame, and feet secured to the outer ends of the cross-bar.

3. In a typewriting machine, the combination of a main-frame, feet detachably secured to said frame, faces on said main-frame with which said feet enga e, a frame extension device'attachable to t e main-frame at said faces when the feet are removed, faces on said device, and means for attaching said feet to said device at its faces, the faces on the main-frame being in the same horizontal plane as those of said device so that the feet may be used directly on the mainframe or on the extension device without altering the height of the machine.

4. In a typewriting machine, the combination of a machine frame, a carriage to travel back and forth laterally thereof, four seats on the machine frame, two feet secured directly to said frame at two of said seats, a cross-bar secured to said frame at the other two seats and extending outwardly at each side thereof, two seats on said cross-bar and two feet, one at each end of the cross bar travel back and fo'rthlaterally thereof, two

feet secured directly to said frame, a crossbar secured to said frame and extending outwardly at each side thereof, two feet, one at each end of "the cross bar, and means for detachably securing the feet to said bar,

means for detachably securing the bar to the main-frame, the bar being so constructed that it with the feet thereon and the feet alone may be interchangeably secured to the main frame withoutchanging the height of the machine.

6. In a typewritin machine, the combination of a machine frame, a carriage suported thereon to travel transversely thereof, aces on the bottom of said frame, feet removably secured to said faces, and a crossbar which may be attached to said faces instead of the feet, said cross bar extending outwardly beyond the sides of said frame, faces on the bottom side of said cross bar and at the ends thereof to Which said feet may be attached, the faces on said bar and the faces on the frame being in the same plane.

when the bar is attached to said frame.

7. In a typewriting machine, the combination of a machine frame, a carriage supported thereon to travel transversely thereof, and supporting means for said frame, said supporting means including two legs on the frame, feet, a transverse bar, said feet and bar being interchangeably attachable to said legs, the bar extending outwardly beyond the sides of the frame, two faces on one side of the bar to engage the le s, and two faces on the opposite side of the ar one at each end thereof, the feet being attachable to the bar at the last mentioned faces, all of the faces on said bar being in the same plane.

FRANK H. TREGOQ 

